Turning a boy down

A guy started to kik me (send me messages). He seems nice, but I can already say that he's nothing for me.

First of all I can't be interested in a guy that I've never met.

I don't buy the crap of giving me compliments the first time you talk to me. You don't know me yet.

I think it's silly to say. " I'm okay if you are" the second question you've answered.

Then he feels rejected when I didn't understand I was supposed to ask him back if I he was single.

Then he says he feels rejected again when I told him the truth,that I was going to do a thing with my family until past midnight. He should trust me and I don't need to say to him over and over again that I'm not rejecting him.

I don't like to get really silly compliments and sentences like:
"I bet you have lots of guys"
"how can you be single"
"I'm okay if you're okay"
And the worst thing to say is when you say all sentences to me during our first chat.

I'm stupid that didn't turn him down immediately after our chat. I feel terrible now, because he lives in the same city as me, but at least I will not meet him during the summer and before school starts again I will turn him down. :S